Fix placement of snow cover over metadata 6. Closes #724

patches/minecraft/net/minecraft/block/BlockSnow.java.patch

@@ -53,7 +53,7 @@
              par1World.setBlockToAir(par2, par3, par4);
          }
      }
-@@ -177,4 +176,10 @@
+@@ -177,4 +176,27 @@
      {
          return par5 == 1 ? true : super.shouldSideBeRendered(par1IBlockAccess, par2, par3, par4, par5);
      }
@@ -62,5 +62,22 @@
 +    public int quantityDropped(int meta, int fortune, Random random)
 +    {
 +        return (meta & 7) + 1;
++    }
++
++    /**
++     * Determines if a new block can be replace the space occupied by this one,
++     * Used in the player's placement code to make the block act like water, and lava.
++     *
++     * @param world The current world
++     * @param x X Position
++     * @param y Y position
++     * @param z Z position
++     * @return True if the block is replaceable by another block
++     */
++    @Override
++    public boolean isBlockReplaceable(World world, int x, int y, int z)
++    {
++        int meta = world.getBlockMetadata(x, y, z);
++        return (meta >= 7 ? false : blockMaterial.isReplaceable());
 +    }
  }